
SAM4CP [DATASHEET]
43051E–ATPL–08/14
 24
5.5.4
Low-power Mode Summary Table
The modes detailed above are the main low-power modes. 
Table 5-2
 below provides a configuration summary of the low-
power modes.
Notes: 1.
Refer to the note in 
Section 5.5 “Low-power Modes”
.
When considering wake-up time, the time required to start the PLL is not taken into account. Once started, the
device works either from the 4, 8 or 12 MHz fast RC oscillator. The user has to add the PLL start-up time if it is
needed in the system. The wake-up time is defined as the time taken for wake-up until the first instruction is fetched.
Refer to 
Table 3-1, “Signal Description List”
. Some anti-tamper pin pads are VDDIO powered.
See PIO Controller Multiplexing tables in 
Section 11.4 “Peripheral Signal Multiplexing on I/O Lines”
.
Refer to the section Electrical Characteristics.
Fast RC Oscillator set to 4 MHz Frequency.
LCD voltage regulator can be OFF if VDDLCD is supplied externally thus saving current consumption of the LCD
voltage regulator.
In this mode, the core is supplied and not clocked but some peripherals can be clocked.
Depends on MCK frequency.
2.
3.
4.
5.
6.
7.
8.
9.
Table 5-2.
Low-power Mode Configuration Summary
Mode
SUPC,
32 kHz
Oscillator,
RTC, RTT
Backup 
Registers,
POR
(Backup 
Region)
Core 
Regulator
/
LCD 
Regulator
Core 0/1
Memory
Peripherals
Mode Entry
(1)
Potential 
Wake-up Sources
Core
at
Wake-up
PIO State 
in Low-
power 
Mode
PIO State
at
Wake-up
Current 
Consumption
Wake-up 
Time
Backup 
Mode
ON
OFF/OFF
OFF / OFF
(Not powered)
VROFF bit = 1
or
SLEEPDEEP = 1
+ WFE
- FWUP pin
- WKUP0-15 pins
(3)
- Supply Monitor 
- Anti-tamper inputs
(3)
- RTC or RTT alarm
Reset
Previous 
(4)
(5)
< 1,5 ms
Backup 
Mode with 
LCD
ON
OFF/ON
OFF / OFF 
(Not powered)
VROFF bit = 1
or
SLEEPDEEP = 1
+ WFE
- FWUP pin
- WKUP0-15 pins
(3)
- Supply Monitor
- Anti-Tamper inputs
(3)
- RTC or RTT alarm
Reset
Previous 
state saved
Unchanged 
(LCD Pins)/
Inputs with 
pull ups
< 1,5 ms
Wait Mode
Flash in 
Standby 
Mode
ON
ON/
(7)
Core 0 and 1, 
memories and 
peripherals:
Powered, but 
Not clocked
WAITMODE = 1 + 
FLPM = 0
or
SLEEPDEEP = 0
+ LPM = 1
+ FLPM = 0
+ WFE
Any Event from:
- Fast start-up through
WKUP0-15 pins
- Anti-Tamper inputs
(3)
- RTC or RTT alarm
Clocked 
back
Previous 
< 10 
μ
s 
Wait Mode
Flash in 
Deep 
Power- 
down 
Mode
(6)
ON
ON/
(7)
Core 0 and 1, 
memories and 
peripherals:
Powered, but 
Not clocked
WAITMODE = 1 + 
FLPM = 1
or
SLEEPDEEP = 0
+ LPM = 1
+ FLPM = 1
+ WFE
Any Event from:
- Fast start-up through
WKUP0-15 pins
- Anti-Tamper inputs
(3)
- RTC or RTT alarm
Clocked 
back
Previous 
< 75 
μ
s 
Sleep 
Mode
ON
ON/
(7)
Core 0 and/or 
Core 1:
Powered
(Not clocked)
(8)
SLEEPDEEP = 0
+ LPM = 0
+ WFE or WFI
Entry mode = WFI
Any Enabled Interrupts;
Entry mode = WFE
Any Enabled Events:
- Fast start-up through
WKUP0-15 pins
- Anti-Tamper inputs
(3)
- RTC or RTT alarm
Clocked 
back
Previous 
(9)
(9)